class_docstr: Class which stores statistics about validation of the submissions.
docstr: Print statistics into log.
docstr_tok: ["Print","statistics","into","log","."]
code: def log_stats(self):
      """Print statistics into log."""
      logging.info("Validation statistics: ")
      for k, v in iteritems(self.stats):
          logging.info(
              "%s - %d valid out of %d total submissions",
              k,
              v[0],
              v[0] + v[1],
          )
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import argparse
  import csv
  import logging
  import os
  import random
  import shutil
  import subprocess
  import tempfile
  from six import iteritems
  import validate_submission_lib
label_desc: Use image node_id 5 for calling the ValidationStats obj's underlying member method code with example usage: obj.log_stats() without return types